MarkAdamson
As things stand, even if you did 60 hours and were virtually ready for the FAA check ride, but didn't complete and have a licence issued, not one of the sixty hours would count towards a UK issued EASA PPL. If you actually gained an FAA licence, you would need to build to 100 hours total time before you could use the specific conversion process to gain the EASA PPL. (Thanks again Europe)
The only way that any hours would count, is if both the instructor and your chosen school were approved by EASA (as well as the FAA). If you found such a school near enough to your work, I'd recommend you try to get both licences.